Don,
Don't hestitate to submit this through Bugzilla when you are ready.
-Ted.
Donald Ball wrote:
>On 8/30/2002 at 7:28 PM Anoop wrote:
>
>>Hi All,
>>
>> I am a newbie to struts and taglibs, was trying to display text fields
>>dynamically using "html:iterator". Below is the scenario I was
>>trying out.
>>
>
>You may be in luck, I've been recently trying to learn how to do something
>similar myself.
>
><snip/>
>
>>The html snippet for the above is something like:
>>
>> <input type="text" name="org" value="Org1">
>> <input type="text" name="org" value="Org2">
>>
>>But I want it to be something like:
>>
>> <input type="text" name="a" value="Org1">
>> <input type="text" name="b" value="Org2">
>>
>>Where the values("a" & "b") for the name attribute comes from an array
>>defined in the Form Bean. What are the changes required in my jsp snippet?
>>
>>Also, if only it is possible to get an output as desired, does the
>>
>FormBean
>
>>be modified to support this. As there won't be any getter/setter for "a"
>>and
>>"b".
>>
>>Appreciate any kind of help regarding this.
>>
>
>First, google around for "map-backed ActionForms" or similar. There's some
>stuff over on jguru that might be helpful. Also, I'm trying to write
>documentation for the struts user's guide for this, so I'd appreciate your
>comments on how (un)clear the following is (apologies for the formatting,
>my mail client sucks):
>
> <section name="4.2.3 Map-backed ActionForms"
>href="map_action_form_classes">
> <p>The DynaActionForm classes offer the ability to create ActionForm
>beans
> at initialization time, based on a list of properties enumerated in the
>struts
>configuration file. However, many HTML forms are generated dynamically at
>request-time. Their ActionForm beans' properties are not all known ahead of
>time, so we need a new approach.</p>
> <p>Struts allows you to make one (or more) of your ActionForm's
>properties
>' values a Map instead of a traditional atomic object. You can then store
>your form's dynamic fields' data in that Map. Here is an example of a
>map-backed ActionForm class:</p>
><pre>
><![CDATA[
>public FooForm extends ActionForm {
>
> private final Map values = new HashMap();
>
> public void setValue(String key, Object value) {
> values.put(key, value);
> }
>
> public Object getValue(String key) {
> return values.get(key);
> }
>
>}
>]]>
></pre>
> <p>In its corresponding JSP page, you can access objects stored in
>the values map using a special notation: <i>mapname(keyname)</i>. The
>parantheses in the bean property name serve to indicate that the bean
>property named <i>mapname</i> should be a Map, and that struts should look
>at the value stored with the key <i>keyname</i> in that Map to find the
>"real" property for <i>mapname(keyname)</i>.</p>
> <p>Here is a simple example:</p>
><pre>
><![CDATA[
><html:text property="value(foo)"/>
>]]>
></pre>
> <p>This will call the getValue() method on FooForm with a key value
>of "foo" to find the property value. To create a form with dynamic field
>names, you might do something like this:</p>
><pre>
><![CDATA[
><% for (int i=0; i<10; i++) {
> String name = "value(foo-" + i + ")";
> <html:text property="<%=name%>"/><br/>
>%>
>]]>
></pre>
> </section>
>
>Hope it helps, thanks in advance for any comments.
>
>- donald
>
>
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